The only GOP chance is if Cuomo runs again, similar to '94 ("ABC"...anyone but Cuomo). Any other Democrat, no matter how much baggage they have, will win without a problem. The GOP bench in NY is beyond pathetic now.
Statewide bench. Gibson is fine enough and moderate enough, but he is one of 27 House members from New York, and not especially known to most people of the state, for example... And NYC votes Democratic almost reflexively now. At least - if Republican candidate is not called Michael Bloomberg...